package com.common.tool;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

import com.alibaba.fastjson.JSONObject;

public class HttpRequest {
    /**
     * 向指定URL发送GET方法的请求
     * @param url
     *            发送请求的URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return URL 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param) {
	String result = "";
	BufferedReader in = null;
	try {
	    String urlNameString = url + "?" + param;
	    URL realUrl = new URL(urlNameString);
	    // 打开和URL之间的连接
	    URLConnection connection = realUrl.openConnection();
	    // 设置通用的请求属性
	    connection.setRequestProperty("accept", "*/*");
	    connection.setRequestProperty("connection", "Keep-Alive");
	    connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
	    // 建立实际的连接
	    connection.connect();
	    // 获取所有响应头字段
	    Map<String, List<String>> map = connection.getHeaderFields();
	    // 遍历所有的响应头字段
	    // for (String key : map.keySet()) {
	    // System.out.println(key + "--->" + map.get(key));
	    // }
	    // 定义 BufferedReader输入流来读取URL的响应
	    in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
	    String line;
	    while ((line = in.readLine()) != null) {
		result += line;
	    }
	} catch (Exception e) {
	    System.out.println("发送GET请求出现异常！" + e);
	    e.printStackTrace();
	}
	// 使用finally块来关闭输入流
	finally {
	    try {
		if (in != null) {
		    in.close();
		}
	    } catch (Exception e2) {
		e2.printStackTrace();
	    }
	}
	return result;
    }

    /**
     * 向指定URL发送GET方法的请求
     * 
     * @param url
     *            发送请求的URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return URL 所代表远程资源的响应结果
     */
    public static String sendGet(String url) {
	String result = "";
	BufferedReader in = null;
	try {
	    String urlNameString = url;
	    URL realUrl = new URL(urlNameString);
	    // 打开和URL之间的连接
	    URLConnection connection = realUrl.openConnection();
	    // 设置通用的请求属性
	    connection.setRequestProperty("accept", "*/*");
	    connection.setRequestProperty("connection", "Keep-Alive");
	    connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");

	    // 建立实际的连接
	    connection.connect();
	    // 获取所有响应头字段
	    Map<String, List<String>> map = connection.getHeaderFields();
	    // 遍历所有的响应头字段
	    // for (String key : map.keySet()) {
	    // System.out.println(key + "--->" + map.get(key));
	    // }
	    // 定义 BufferedReader输入流来读取URL的响应
	    in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
	    String line;
	    while ((line = in.readLine()) != null) {
		result += line;
	    }
	} catch (Exception e) {
	    System.out.println("发送GET请求出现异常！" + e);
	    e.printStackTrace();
	}
	// 使用finally块来关闭输入流
	finally {
	    try {
		if (in != null) {
		    in.close();
		}
	    } catch (Exception e2) {
		e2.printStackTrace();
	    }
	}
	return result;
    }

    /**
     * 向指定 URL 发送POST方法的请求
     * 
     * @param url
     *            发送请求的 URL
     * @param param
     *            请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param) {
	PrintWriter out = null;
	BufferedReader in = null;
	String result = "";
	try {
	    URL realUrl = new URL(url);
	    // 打开和URL之间的连接
	    URLConnection conn = realUrl.openConnection();
	    // 设置通用的请求属性
	    conn.setRequestProperty("accept", "*/*");
	    conn.setRequestProperty("connection", "Keep-Alive");
	    conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
	    // 发送POST请求必须设置如下两行
	    conn.setDoOutput(true);
	    conn.setDoInput(true);
	    // 获取URLConnection对象对应的输出流
	    out = new PrintWriter(conn.getOutputStream());
	    // 发送请求参数
	    out.print(param);
	    // flush输出流的缓冲
	    out.flush();
	    // 定义BufferedReader输入流来读取URL的响应
	    in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
	    String line;
	    while ((line = in.readLine()) != null) {
		result += line;
	    }
	} catch (Exception e) {
	    System.out.println("发送 POST 请求出现异常！" + e);
	    e.printStackTrace();
	}
	// 使用finally块来关闭输出流、输入流
	finally {
	    try {
		if (out != null) {
		    out.close();
		}
		if (in != null) {
		    in.close();
		}
	    } catch (IOException ex) {
		ex.printStackTrace();
	    }
	}
	return result;
    }

    public static String senPost(String url, JSONObject json) {
	StringBuffer sb = new StringBuffer("");
	try {
	    // 创建连接
	    URL realUrl = new URL(url);
	    HttpURLConnection connection = (HttpURLConnection) realUrl.openConnection();
	    connection.setDoOutput(true);
	    connection.setDoInput(true);
	    connection.setRequestMethod("POST");
	    connection.setUseCaches(false);
	    connection.setInstanceFollowRedirects(true);
	    connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
	    connection.connect();
	    // POST请求
	    DataOutputStream out = new DataOutputStream(connection.getOutputStream());
	    out.writeBytes(json.toString());
	    out.flush();
	    out.close();

	    // 读取响应
	    BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
	    String lines;
	    while ((lines = reader.readLine()) != null) {
		lines = new String(lines.getBytes(), "utf-8");
		sb.append(lines);
	    }
	    reader.close();
	    // 断开连接
	    connection.disconnect();
	} catch (MalformedURLException e) {
	    e.printStackTrace();
	} catch (UnsupportedEncodingException e) {
	    e.printStackTrace();
	} catch (IOException e) {
	    e.printStackTrace();
	}
	return sb.toString();
    }

}
